稠油输送管道内嵌牺牲阳极材料的选择
Selection of Materials for Embedded Sacrificial Anode in Heavy Oil Pipeline
摘 要
通过腐蚀试验、恒电流加速试验以及耦合性能试验，研究了铝合金和锌合金作为牺牲阳极材料在高温稠油输送管道中的适用性。结果表明：随着温度升高，两种阳极材料的腐蚀速率增大，实际电容量和电流效率减小，消耗率增大，使用寿命降低。在80 ℃条件下，铝阳极的腐蚀速率和消耗率均低于锌阳极的，且与T/S-52K管线钢的耦合电位更负，耦合电流更大，阴极保护作用更显著，而锌阳极在80 ℃下的工作电位高于最小保护电位，不满足GB/T 21448-2017标准的要求。铝合金较锌合金更适合作为高温稠油输送管道的牺牲阳极材料。
内嵌牺牲阳极
铝合金
锌合金
sacrificial anode
high temperature
aluminum alloy
zinc alloy
Abstract
The applicability of aluminum alloy and zinc alloy as sacrificial anode materials in high-temperature heavy oil pipelines was studied through corrosion test, constant current accelerated test and coupling performance test. The results show that as the temperature increased, the corrosion rate of the two anode materials increased, the actual capacitance and current efficiency decreased, the consumption rate increased, and the service life decreased. At 80 ℃, the corrosion rate and consumption rate of aluminum anode were lower than those of zinc anode, and the coupling potential with T/S-52K pipeline steel was more negative, the coupling current was larger, and the cathodic protection effect was more significant. Working potential of zinc anode at 80 ℃ was higher than the minimum protection potential, which did not meet the requirements of the GB/T 21448-2017 standard. Aluminum alloy is more suitable than zinc alloy used as sacrificial anode material for high-temperature heavy oil pipelines.
中图分类号 TG174.2 DOI 10.11973/fsyfh-202104013
所属栏目 应用技术
基金项目 国家自然科学基金青年科学基金（51902254）；陕西省自然科学基础研究计划（2016JM5064；2018JQ5108）；西安石油大学《材料科学与工程》省级优势学科（YS37020203）
收稿日期 2020/5/26
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引用该论文: LEI Bo,CHENG Mengmeng,ZHAO Kaifeng,JIANG Yi,WANG Chen,Lü Xianghong. Selection of Materials for Embedded Sacrificial Anode in Heavy Oil Pipeline[J]. Corrosion & Protection, 2021, 42(4): 67
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【5】贺亚维. 稠油乳化降粘输送优化运行研究[J]. 化学工程师,2020,34(2):40-45.
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【7】李嘉诚. 原油管道掺混输送运行风险分析[J]. 辽宁化工,2020,49(1):80-82.
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